IV-59
HYDRAULIC UNITS
CONTROL VALVE (HIGH FLOW)
DISASSEMBLY AND ASSEMBLY
General Cautions
• Since all parts in control valves are precision
machined, carry out disassembly and assembly
operations in a clean place.
• Before disassembly, clean the outside surfaces
around the valves.
• Clean each of the disassembled parts and apply
clean hydraulic oil to them.
• Apply hydraulic oil to sliding surfaces and apply
a thin coating of grease to seals when assembling
them.
• Replace all seals with new ones each time the
valves are disassembled.
• Spools and section bodies are specially selected
for a precise fit. Therefore, if any damage is found
in either of these parts, replace the section assem-
bly as a unit.
• Be sure to number each section and spool to avoid
mistakes during assembly.
Following is an explanation of the control valve dis-
assembly procedure.
Follow the procedure used to disassemble the con-
trol valve in reverse order when reassembling it.
Disassembly
1. Loosen the nuts and remove the tie rods, then
remove the sections.
Nut: 39.23 ±3.92 N·m
2. Remove the O-ring.
• The mating surfaces are metal seals, so be
careful not to scratch, bruise or otherwise
damage them.
3. Remove the relief valve, then remove the O-
rings from the relief valve.
• Do not disassemble the relief valves unless it
is necessary.
• When using a spanner or adjustable wrench,
be sure to attach it in the place shown in the
figure at right.
Relief Valve: 65.0 ±6.5 N·m
4. Remove the spring (1) and the plunger (2).
5. Remove the plug (3) and the valve seat (4), then
remove the O-ring from the plug (3).
Plug: 65.0 ±6.5 N·m
Summary of Contents for TL150
Page 1: ...TL150 Track Loader BOOK No CT7E901 WORKSHOP MANUAL Serial No 21500004...
Page 4: ...0 4...
Page 5: ...I 1 I GENERAL...
Page 18: ...I 14 GENERAL...
Page 19: ...II 1 II SPECIFICATIONS...
Page 44: ...III 1 III MACHINE CONFIGURATION...
Page 94: ...III 51 MACHINE CONFIGURATION ELECTRICAL SYSTEM ELECTRICAL SYSTEM ELECTRICAL WIRING DIAGRAM...
Page 122: ...III 79...
Page 146: ...MACHINE CONFIGURATION III 103...
Page 147: ...IV 1 IV HYDRAULIC UNITS...
Page 152: ...IV 6 HYDRAULIC UNITS HST PUMP 1 Plug 2 Plug 3 Plug 4 Screw 5 Seal Nut 6 Plug Pump Assembly 4 4...
Page 189: ...IV 43 HYDRAULIC UNITS GEAR PUMP INSPECTION AND ADJUSTMENT IV 36 38 TROUBLESHOOTING IV 39...
Page 230: ...IV 84 HYDRAULIC UNITS PILOT VALVE INSPECTION AND ADJUSTMENT IV 79 TROUBLESHOOTING IV 80...
Page 261: ...IV 115 HYDRAULIC UNITS TRAVEL MOTOR DISASSEMBLY AND ASSEMBLY Special tools...
Page 263: ...IV 117 HYDRAULIC UNITS TRAVEL MOTOR...
Page 282: ...IV 136 HYDRAULIC UNITS TRAVEL MOTOR...
Page 283: ...V 1 V TROUBLESHOOTING...